You must be using a French/English translator to write this. No problem.

In your old website, the segment from ‘Coaching professionnel et personnel novateur, créatif et humain !’ on the top, all the way down to ‘Objectifs et résolutions’ on the bottom, would be your content, and most of your h1, h2, h3, h4, h5 tags are located there. So you would just paste that entire block of your old code into the page you designate as your home page.

You need to create a custom template and attach the template to a page that you designate as your homepage. In the template you can add component blog + component columns where you have your verbiage (paragraphs). The SEO plugin by Yoast will allow you to add titles, meta description on a per page, per category etc…